James Montemagno introduces the Event Social Post Wall, an open-source tool built for events like .NET Conf, aimed at collecting and moderating attendee questions and discussions from various platforms. The tool incorporates a unique moderation workflow, separates content submission from presentation, and provides extensive customization options for event hosts. Designed with community engagement in mind, it enables real-time interaction while maintaining control over displayed content. Montemagno shares insights into its technology stack, development process, and future plans for upgrading to .NET 11.